/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package controllers;

import daos.ItemDAO;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import models.Item;
import models.Member;
import models.ShoppingCart;

/**
 *
 * @author triet.to
 */
public class ShoppingCartServlet extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            Member member = (Member)request.getSession().getAttribute("user");
            ArrayList<ShoppingCart> lstCarts = (ArrayList<ShoppingCart>)(request.getSession().getAttribute("carts"));
            if(lstCarts==null)
                lstCarts = new ArrayList<ShoppingCart>();
            String sItemId = request.getParameter("itemid");
            int itemId = 0;
            if(sItemId!=null){
                itemId = Integer.parseInt(sItemId);
            }
            if(member!=null && itemId>0){
                boolean bFound = false;
                Item item = ItemDAO.singleton().select(itemId);
                for (ShoppingCart shoppingCart : lstCarts) {
                    if(shoppingCart.getUserId()==member.getMemberId()
                            && shoppingCart.getItemId() == itemId){
                        shoppingCart.setQuantity(shoppingCart.getQuantity()+1);
                        shoppingCart.setPrice(item.getPrice()*shoppingCart.getQuantity());
                        bFound = true;
                    }
                }
                if(!bFound){                    
                    if(item!=null){
                        lstCarts.add(new ShoppingCart(itemId, member.getMemberId(), "", item.getPrice(), 1));
                    }
                }
                request.getSession().setAttribute("carts", lstCarts);
                response.sendRedirect("/BookStoreWeb/Default.jsp");
            }else{
                response.sendRedirect("/BookStoreWeb/Login.jsp");
            }
        } finally { 
            out.close();
        }
    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
